As a commercial driver in Quebec, Canada, it is vital to understand and abide by the strict traffic rules that govern the transport industry.


Quebec Commercial Driver Test 03

1 / 30

What is the purpose of an air purifier in an air brake system?

2 / 30

As a responsible driver, you should look ahead over the distance you will be covering in the next:

3 / 30

How is compressed air supplied to a semitrailer's reservoirs?

4 / 30

Which of the following is not one of the factors determining the braking power?

5 / 30

What mechanism causes the vehicle to slow down in a drum brake system when the driver presses the brake pedal?

6 / 30

If the low pressure light comes on, indicating that your service brake system is failing, what should you do?

7 / 30

Which of the following is not an appropriate use for the trailer hand brake?

8 / 30

The emergency brake will take over and bring the vehicle to a stop when the pressure in the service brakes drops below:

9 / 30

Which of the following situations could prevent you from clearing an overpass even if your vehicle is shorter than the height indicated?

10 / 30

What does the air pressure gauge tell you?

11 / 30

When the brake pedal has been applied, what happens immediately after compressed air pushes on the diaphragm of the brake chamber?

12 / 30

If you are carrying a heavy load, why is it important to increase your stopping distance rather than increasing your braking power when bringing the vehicle to a stop?

13 / 30

How often should you be checking your rearview mirrors?

14 / 30

Which of the following statements is true about the primary and secondary circuits of an air brake system?

15 / 30

Air brake systems might operate at different pressure levels, but the difference in pressure between when the air compressor starts and stops operating is always the same. It is:

16 / 30

Which is not a major factor contributing to 'brake fading'?

17 / 30

What is best practice for using your supplemental brakes when going down a hill with a loaded vehicle?

18 / 30

What would two needles in an air pressure gauge indicate?

19 / 30

Why is it important for drivers to know about brake lag?

20 / 30

What is an essential guideline to follow when negotiating a curve?

21 / 30

When is jackknifing most likely to occur?

22 / 30

If you doing a brake adjustment inspection, what is the sign that your brake(s) needs to be adjusted?

23 / 30

When entering a right curve in a heavy vehicle, the driver should:

24 / 30

Which of the sequences below correctly describes how air from the outside of the vehicle travels through the brake system?

25 / 30

If you are making a turn in a heavy vehicle, when is the correct time to accelerate?

26 / 30

If an air compressor begins operating when the air pressure in the service reservoirs drops below 714 kPa, then the air compressor will stop filling them when the pressure reaches:

27 / 30

What happens when the parking brake knob is pushed in?

28 / 30

What does the acronym GVWR stand for?

29 / 30

Retarders will:

30 / 30

What is the correct way to ensure you are following the vehicle in front at a safe distance:

Your score is


Some of these rules include mandatory vehicle inspections, strict speed limits, and adherence to hours of service regulations. Commercial drivers must also have a Commercial Driver’s License (CDL) obtained after passing various tests to assess knowledge and skill levels. Commercial drivers need to be aware of the rules of the road, such as yielding to pedestrians, obeying traffic signals, and avoiding distracted driving. Ignoring these rules can have severe consequences, including fines, license suspensions, and even imprisonment in some cases. Furthermore, commercial drivers are subject to stricter blood-alcohol limits and may be required to undergo regular drug and alcohol testing to ensure safety on the road. By following such regulations, commercial drivers can help prevent accidents and injuries while operating their vehicles in Quebec.

To begin your career in commercial driving, you must obtain your Quebec Class 1, Class 2, Class 3, or Class 4 Heavy Vehicle Driver Licence.
These online practice tests were developed to help individuals study for their Heavy Vehicle driver’s licence. Our practice testing area is designed to help you learn the information on your actual written knowledge test and familiarize you with the testing format. All testing material is covered in official Quebec’s ‘Driving a Heavy Vehicle‘ manual.